I *could* hack around with a log of things.
Although if I was going to add a single column, it would have to be a 32-bit integer and have a bit per image. :p
However I was looking for a nice mod that had done the hard work for me. E.g. it would also need an admin screen to setup the html. In fact, it could be a complete html template driven thing, no real need to restrict it to images at all. So if you specify option A, you get all of option A html. Then there's issues of updating the product edit screens to allow selection through the UI etc.